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Cylindropuntia whipplei (= Opuntia w.)
This attractive cactus is native to desert and grasslands of the southwestern USA, at elevations between 1000 and 2500 m. It may grow in the form of a spreading or an upright shrub to about 2 m tall and has green, very spiny, cylindrical stems, yellow flowers and fleshy, spineless, yellowish-green fruits. The Native Indians used to eat the fruit raw or in cooked in stews. It is not common in cultivation but tolerates drought and cold and grows well in temperate climates in USDA Zones 5 and above.